ota_from_target_files requires apexd_host

apexd_host is invoked in check_target_files_vintf.py
to prepare the apex directory before invoking checkvintf. ota_from_target_files uses check_target_files_vintf.py via (python_library) releasetools_check_target_files_vintf.

Since soong doesn't inherit "required:" property from library to binary, adding the dependency manually to ota_from_target_files.

Bug: n/a
Test: $ m ota_from_target_files # should build apexd_host
Change-Id: Ie7e6c3acf376c23960f242294f5a9bf99fec26aa
diff --git a/tools/releasetools/Android.bp b/tools/releasetools/Android.bp
index c785c8e..bd347a1 100644
--- a/tools/releasetools/Android.bp
+++ b/tools/releasetools/Android.bp
@@ -165,6 +165,7 @@
         "ota_utils_lib",
     ],
     required: [
+        "apexd_host",
         "brillo_update_payload",
         "checkvintf",
         "generate_gki_certificate",
@@ -643,6 +644,7 @@
         },
     },
     required: [
+        "apexd_host",
         "deapexer",
     ],
 }